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AD7714ARS-5 参数 Datasheet PDF下载

AD7714ARS-5图片预览
型号: AD7714ARS-5
PDF下载: 下载PDF文件 查看货源
内容描述: 3 V / 5 V , CMOS , 500微安信号调理ADC [3 V/5 V, CMOS, 500 uA Signal Conditioning ADC]
分类和应用: 转换器光电二极管
文件页数/大小: 40 页 / 308 K
品牌: ADI [ ADI ]
 浏览型号AD7714ARS-5的Datasheet PDF文件第31页浏览型号AD7714ARS-5的Datasheet PDF文件第32页浏览型号AD7714ARS-5的Datasheet PDF文件第33页浏览型号AD7714ARS-5的Datasheet PDF文件第34页浏览型号AD7714ARS-5的Datasheet PDF文件第36页浏览型号AD7714ARS-5的Datasheet PDF文件第37页浏览型号AD7714ARS-5的Datasheet PDF文件第38页浏览型号AD7714ARS-5的Datasheet PDF文件第39页  
AD7714  
Temperature Measurement  
Another application area for the AD7714 is in temperature  
measurement. Figure 13 outlines a connection from a thermo-  
couple to the AD7714. In this application, the AD7714 is oper-  
ated in its buffered mode to allow large decoupling capacitors  
on the front end to eliminate any noise pickup which there may  
have been in the thermocouple leads. When the AD7714 is  
operated in buffered mode, it has a reduced common-mode  
range. In order to place the differential voltage from the thermo-  
couple on a suitable common-mode voltage, the AIN2 input of  
the AD7714 is biased up at the reference voltage, +2.5 V.  
+5V  
2
AV  
DV  
DD  
DD  
AV  
DD  
AD7714  
THERMOCOUPLE  
JUNCTION  
1A  
R
R
AIN1  
AIN2  
CHARGE BALANCING A/D  
STANDBY  
CONVERTER  
C
C
AUTO-ZEROED  
DIGITAL  
FILTER  
SYNC  
AIN3  
AIN4  
AIN5  
AIN6  
⌺⌬  
PGA  
BUFFER  
MODULATOR  
A = 1–128  
MCLK IN  
CLOCK  
GENERATION  
1A  
+5V  
SERIAL INTERFACE  
MCLK OUT  
AGND  
REGISTER BANK  
+V  
IN  
REF IN (+)  
RESET  
V
OUT  
AD780  
GND  
DRDY  
REF IN (–)  
AGND  
POL  
DGND  
BUFFER  
DOUT  
DIN  
SCLK  
CS  
DV  
DD  
Figure 13. Thermocouple Measurement Using the AD7714  
REV. C  
–35–  
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